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Article
Yann Rime, Auteur ; Pius Korner, Auteur ; Barbara Helm, Auteur ; Valentin Amrhein, Auteur ; Christoph M. Meier, AuteurAlpine grasslands are increasingly facing pressures of climate and land-use changes. Higher temperatures and pastoral abandonment lead to treeline shift and to bush encroachment, while agricultural intensification causes soil eutrophication and [...]
Article
Julia Paterno, Auteur ; Fränzi Korner-Nievergelt, Auteur ; Pia Anderwald, Auteur ; Valentin Amrhein, AuteurBirds often have a peak of singing activity at dawn, and the timing of dawn song is species-specific. However, the start of singing at dawn may also depend on environmental factors. We investigated the effects of different environmental variable[...]
Article
Article
Valentin Amrhein, Auteur ; Hansjoerg P. Kunc, Auteur ; Rouven Schmidt, Auteur ; Marc Naguib, AuteurIn many bird species the sex ratio of adults is male-biased, which is likely to have consequences for the ecology as well as for the conservation of a species. For example, when some males remain unpaired in a population, there should be strong [...]
Article
Philipp Sprau, Auteur ; Tobias Roth, Auteur ; Valentin Amrhein, Auteur ; Marc Naguib, AuteurIn territorial animals, establishing and defending a territory against rivals is commonly a prerequisite for successful reproduction. Yet, often, non-territorial males that are seeking to establish their own territory may intrude into occupied t[...]
Article
Nathaline Erne, Auteur ; Valentin Amrhein, AuteurMales of many songbird species have peaks of singing activity at dawn and dusk. Singing during those twilight periods can function in territory proclamation, and males are suggested to adjust song output to the level of intruder pressure. We use[...]
Article
Philipp Sprau, Auteur ; Tobias Roth, Auteur ; Valentin Amrhein, Auteur ; Marc Naguib, AuteurIn animal communication, elaborate signals have been shown to be under sexual selection and often to reliably indicate a signaler's quality, condition, or motivation. For instance, the performance of physically challenging signals such as trills[...]
